Elasticsearch 2.4.0 stdout logging size restriction

We have elasticsearch 2.4 installation, sometimes stdout logs go over 100GB size.
Though I have configured the log4j settings to

file:
type: rollingFile
file: {path.logs}/{cluster.name}.log
maxFileSize: 10MB
maxBackupIndex: 10
layout:
type: pattern
conversionPattern: "[%d{ISO8601}][%-5p][%-25c] %.10000m%n"

Looks like this stdout and stderr logs are not controlled via Log4J.
Is there any way to disable stdout or restrict the size?

hey
what sort of messages you get on stdout?
What plugins do you have installed?